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Questions and Answers
Which structure is responsible for guarding the laryngeal inlet?
Which structure is responsible for guarding the laryngeal inlet?
At what level does the pharynx transition into the esophagus?
At what level does the pharynx transition into the esophagus?
Which component of the nasal cavity does NOT contribute to its medial wall?
Which component of the nasal cavity does NOT contribute to its medial wall?
Which of the following is a type of para nasal sinus?
Which of the following is a type of para nasal sinus?
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The hard palate is continuous posteriorly with which structure?
The hard palate is continuous posteriorly with which structure?
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Which part of the pharynx contains the opening of the Eustachian tube?
Which part of the pharynx contains the opening of the Eustachian tube?
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Which part of the nasal cavity is responsible for housing the three conchae?
Which part of the nasal cavity is responsible for housing the three conchae?
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What structure divides the nasopharynx from the oropharynx?
What structure divides the nasopharynx from the oropharynx?
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The nasal cavity is mainly divided by the:
The nasal cavity is mainly divided by the:
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Which of the following is NOT true regarding the components of the pharynx?
Which of the following is NOT true regarding the components of the pharynx?
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Which compartment of the neck contains the infrahyoid and suprahyoid muscles?
Which compartment of the neck contains the infrahyoid and suprahyoid muscles?
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What structure primarily connects the two lobes of the thyroid gland?
What structure primarily connects the two lobes of the thyroid gland?
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Which of the following muscles is NOT located in the superficial muscular compartment?
Which of the following muscles is NOT located in the superficial muscular compartment?
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Which compartment contains the pretracheal fascia?
Which compartment contains the pretracheal fascia?
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What does the carotid sheath encompass?
What does the carotid sheath encompass?
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The deep muscular compartment is mainly surrounded by which fascia?
The deep muscular compartment is mainly surrounded by which fascia?
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Which triangle contains the submandibular salivary gland?
Which triangle contains the submandibular salivary gland?
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The anterior boundary of the anterior triangle of the neck is defined by which structure?
The anterior boundary of the anterior triangle of the neck is defined by which structure?
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Which layer of fascia surrounds the cervical vertebrae in the neck?
Which layer of fascia surrounds the cervical vertebrae in the neck?
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What is the main function of the cervical plexus in the deep muscular compartment?
What is the main function of the cervical plexus in the deep muscular compartment?
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Study Notes
Neck Compartments
- The neck has three compartments surrounding cervical vertebrae, each with its own fascia.
- The superficial muscular compartment has investing fascia.
- The visceral and vascular compartments have pretracheal fascia and carotid sheath respectively.
- The deep muscular compartment has prevertebral fascia.
Superficial Muscular Compartment
- Contains sternomastoid and trapezius muscles.
- Includes infrahyoid muscles like omohyoid (superior and inferior bellies).
- Includes suprahyoid muscles like digastric (anterior and posterior bellies).
- Investing fascia covers and surrounds these structures and defines the triangles of the neck.
Neck Triangles (Anterior)
- Boundaries include sternomastoid, mandible, and anterior midline of the neck.
- Subdivided into submental and digastric triangles.
- Digastric triangle contains the submandibular salivary gland.
- Carotid triangle contains the carotid sheath.
- Muscular triangle is another division.
- Post. Triangle is between sternomastoid, trapezius, and clavicle.
Visceral & Vascular Compartment
- Contains organs (medially) and vessels (laterally) in the anterior-posterior arrangement.
- Organs include thyroid gland (with isthmus connecting lobes), larynx, and pharynx.
- Pharynx leads into the esophagus.
- Carotid sheath surrounds the common and internal carotid arteries, internal jugular vein, and vagus nerve.
Deep Muscular Compartment
- Surrounded by prevertebral fascia, containing prevertebral muscles (e.g., longus colli).
- Also contains lateral scalene (anterior, middle, posterior) and posterior back muscles (4 layers).
- Includes cervical plexus (C1-C4 spinal nerves) and brachial plexus nerves (C5-T1 spinal nerves) related to the upper limb.
Sagittal Section of the Head & Neck
- Nasal cavity is divided by a nasal septum into two halves.
- The hard palate is continuous with the soft palate, which projects into the midline as the uvula.
- Lateral walls of the nasal cavity have conchae (superior, middle, inferior).
- Para-nasal sinuses are air-filled spaces in skull bones (frontal, sphenoidal, ethmoidal, maxillary).
Oral Cavity and Pharynx
- The pharynx is a muscular tube behind the oral cavity and larynx, leading to the esophagus.
- It is divided into nasopharynx, oropharynx, and laryngopharynx.
- Nasopharynx contains the opening of the Eustachian tube.
- Oropharynx contains palatine tonsils.
- Larynx contains a significant structure—the epiglottis.
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Description
Explore the anatomy of the neck compartments and the various triangles formed by their boundaries. This quiz covers the superficial muscular compartment, its associated muscles, and the subdivisions of the anterior neck triangles, including their anatomical significance. Test your knowledge on the fascia and structures within these regions.
